Milling-chuck.



PATENTED NOV. 8, 1904.

J. & W. R. THOMAS.

MILLING CHUCK.

APPLICATION TILED JAN.13, 1904.

H0 MODEL.

lewmow/ %W Wm Q 0 25M.

UNTTEE STATES Patented November 8, 1904:.

PATENT @EEicE.

JAMES THOMAS AND WILLIAM R. THOMAS, OF CATASAUQUA,

' PENNSYLVANIA.

MILLING-CHUCK- SPEOIFIGATION forming part of Letters Patent No. 774,616, dated. November 8, 1904.

Application filed January 13, 1904-.- Serial No. 188,865. (No model.)

To all whom, it may concern.

Be it known that we, JAMEs THOMAS and WILLIAM R. THoMAs, citizens of the United States, residing at Catasauqua, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful Improvements in Milling-Chucks; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

This invention relates .to improvements in supports, and particularly to chucking-heads for supporting articles during a machining J operation.

The object in view is the supporting of an article in position for facilitating a machining operation, and this object is attained by the employment of a plurality of chucking-head standards spaced apart, a clamping-plate carried by each of said heads, and a wedging device carried by some of said plates.

The invention comprises certain novel constructions, combinations, and arrangements of parts, as will be hereinafter fully describedand claimed.

In the accompanying drawings, Figure 1 represents a view in side elevation of a support embodying the features of the present invention. Fig. 2 represents a view in end elevation thereof. Fig. 3 represents a detail fragmentary sectional view taken through one of the standards and illustrating the bolt thereof in position. Fig. 4 represents a view similar to Fig. 1 of a slightly-modified construction. Fig. 5 represents a view in end elevation of the structure disclosed in Fig. 4.

The present improved support or chuckinghead is designed especially for retaining in position the keys of a tunnel-lining during the machining thereof, butof course may be utilized for retaining any articles during such operation.

Referring to the drawings by numerals, 1 indicates the base of a chucking-head, provided with end vertical standards 2 2 and intermediate vertical standards 3 3. As best seen in Fig. 3, each of said standards is formed with a vertical notch or recess designed to snugly receive a bolt 4, said recess being formed with a shoulder 5 for preventing vertical movement of the bolt to or from the respective standard. Each of the standards 3 is provided with a clamping-plate 5, penetrated by the respective bolt 4 and designed to be locked in a clamping position by means of a nut 6 on said bolt. each plate 5 being formed at each side of the respective standard 3 with a shouldered clamping projection. Each of the clamping-plates 5 is formed with a surface of a contour designed to fit snugly upon the upper surface of the key 7 to be operated upon. Each of the end standards 2 carries at its upper end a clamping-plate 8, penetrated by the respective bolt 4 and retained in place by nut 9, threaded thereon. The under surface of each plate 8 is cut away at its inner edge for conforming to the contour of the upper surface of the respective key 7 being operated upon. It will be observed that the keys 7 are of tapered formation and the central standards 3 are correspondingly tapered in an opposite sense, the inner wall of each end standard being inclined to compensate for the taper of the end of the key engaging such wall.

In operation the head 1 is secured to the table of a milling or planing machine and the keys 7 are clamped in position by means of the plates 5 and 8, and as both ends of the keys are exposed such ends may be operated upon without removal of the keys from the head.

In Figs. 4 and 5 we have illustrated a modified construction especially adapted for retaining the keys 7 in position for having their sides planed or milled instead of their ends, as seen in Figs. 1 and 2. The structure disclosed in Figs. 4 and 5 consists of a head 10, provided with a central vertical standard 11 and end standards 12 12, each of said standards carrying at its upper end a clamping-plate 13, penetrated by a locking-bolt 14, arranged and positioned in a manner similar to the arrangement of bolt 4. A bolt 14 is threaded through the plate 13, carried by standard 11, and is adapted to engage at its lower end a wedging-block 15, which block 15 is constructed with suitable beveled faces engaging on one side the standard 11. and on the other the end of key 7, whereby after the clamps 13 have been positioned a downward threading of the bolt 14L is designed to lock a key 7 in position. The plate 13, car- .ried by one of the end standards, may also be penetrated by a bolt 16, similar to bolt 1 L, engaging a wedging-block 17, designed to operate in a manner similar to the operation of the block 15, said block 17 engaging a key 7, arranged on the opposite side of standard 11 from the block 15.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. A chucking-head comprising a base, a plurality of standards extending therefrom, a plate carried by one of said standards and overhanging the side thereof next to the other of said standards, a wedge arranged beneath said plate, and means carried by the overhanging portion of said plate for effecting movement of said wedge for producing a clamping action thereof upon an article arranged between said wedge and the opposite standard.

2. A chucking-head comprising a base, a plurality of standards rising vertically therefrom and spaced apart, said standards being adapted to have articles to be operated upon positioned between the same, aclamping-plate carried by each of said standards, a wedge between said standards adapted to contact with one'side of one of the standards, and means carried by one of the clamping-plates for actuating said wedge for compressing the article to be operated upon against the other of said standards.

3. A chucking-head comprising a base, a plurality of standards extending therefrom, a clamping-plate carried by each of said standards, a wedge at one side of one of said. standards, and a bolt threaded through the plate carried by said last-mentioned standard and engaging said wedge for actuating the same.

in testimony whereof wehereunto affix our signatures in presence of two witnesses.

JAMES THOWAS. \VlLL lAM R. THOMAS Witnesses CHARLES R. HORN, AUs'rIN A. (JrLIoK. 

